AIRD-02-3R9K Equivalent & Substitute Parts

Part Overview

The AIRD-02-3R9K is a 3.9 µH unshielded drum core wirewound inductor manufactured by Abracon LLC, rated for 11.4 A continuous current with a maximum DC resistance of 5 mOhm. This component is designed for through-hole mounting in radial, vertical cylinder configuration with a 0.827" diameter footprint.

The AIRD-02-3R9K has reached obsolete product status. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring this inductance value and current rating.

Substiute Parts

AIRD-02-3R9K

Abracon LLCIn Stock: 810AIRD-02-3R9K Datasheet

Current PartRFQ

AIRD-02-3R9M

Abracon LLCIn Stock: 794AIRD-02-3R9M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AIRD-02-3R9K is determined by the following critical parameters:

• Inductance Value: 3.9 µH (primary electrical specification)
• Current Rating: 11.4 A minimum (thermal and saturation performance)
• DC Resistance: 5 mOhm maximum (power loss and thermal characteristics)
• Saturation Current: 50 A minimum (core performance margin)
• Core Material: Ferrite (magnetic properties and frequency response)
• Mounting Configuration: Through hole, radial vertical cylinder (PCB layout compatibility)
• Physical Dimensions: 0.827" diameter, 0.827" height seated (footprint compatibility)
• Operating Temperature Range: -25°C ~ 85°C (environmental suitability)
• Compliance: ROHS3 compliant (regulatory requirement)

The AIRD-02-3R9M qualifies as a direct substitute based on matching all critical electrical and mechanical parameters within specified tolerances.

Parameter Comparison

Engineering Selection Recommendations

The AIRD-02-3R9M is the qualified substitute for the obsolete AIRD-02-3R9K. Both components are manufactured by Abracon LLC within the AIRD-02 series and maintain identical electrical performance specifications for inductance, current rating, and DC resistance.

The primary difference is inductance tolerance: the AIRD-02-3R9K specifies ±10% tolerance while the AIRD-02-3R9M specifies ±20% tolerance. This tolerance variance must be evaluated against circuit design requirements. Applications with strict inductance tolerance requirements may require circuit compensation or alternative component selection.

The AIRD-02-3R9M carries active product status, ensuring ongoing availability and supply chain support. Both components meet ROHS3 compliance and REACH unaffected status, satisfying current regulatory requirements. Physical footprint and mounting configuration are identical, enabling direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the AIRD-02-3R9M directly replace the AIRD-02-3R9K on existing PCBs?

A: Yes. Both components share identical physical dimensions (0.827" diameter, 0.827" height), mounting type (through hole), and package configuration (radial vertical cylinder). No PCB layout modifications are required.

Q: What is the impact of the inductance tolerance difference between these parts?

A: The AIRD-02-3R9K specifies ±10% inductance tolerance while the AIRD-02-3R9M specifies ±20%. For applications where inductance value is critical to circuit performance, verify that the wider ±20% tolerance of the substitute part remains within acceptable operating parameters.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both components are ROHS3 compliant and REACH unaffected. Regulatory compliance is equivalent.

Q: Why is the AIRD-02-3R9K obsolete?

A: Product obsolescence is determined by the manufacturer. The AIRD-02-3R9M, as an active product within the same series, provides functional continuity for applications requiring this inductance and current rating specification.

Q: Are the electrical performance characteristics identical?

A: Yes. Both components specify 3.9 µH inductance, 11.4 A current rating, 50 A saturation current, and 5 mOhm maximum DC resistance. Electrical performance is equivalent within specified tolerances.

Q: What is the current inventory status?

A: The AIRD-02-3R9K has 723 pieces in stock (obsolete status). The AIRD-02-3R9M has 763 pieces in stock (active status). For new designs or long-term supply requirements, the active AIRD-02-3R9M is the recommended selection.